Romans 11:24-27

For if you were cut off from what is by nature a wild olive tree, and against nature were grafted into a cultivated olive tree, how much easier will it be to graft these who are the natural branches back into [the original parent stock of] their own olive tree? I do not want you, believers, to be unaware of this mystery [God’s previously hidden plan]—so that you will not be wise in your own opinion—that a partial hardening has [temporarily] happened to Israel [to last] until the full number of the Gentiles has come in; and so [at that time] all Israel [that is, all Jews who have a personal faith in Jesus as Messiah] will be saved; just as it is written [in Scripture], “THE DELIVERER (Messiah) WILL COME FROM ZION, HE WILL REMOVE UNGODLINESS FROM JACOB.” [Is 59:20, 21] “THIS IS MY COVENANT WITH THEM, WHEN I TAKE AWAY THEIR SINS.” [Is 27:9; Jer 31:33]